Version used: 0.11.1, build 609

In previous versions, a bound cleric circle would always have access to the bound player along with a small radius around them. In 1.20, this does not seem to be the case. A bound cleric circle that attempts to use Mind's Reflection will fail unless the bound player is standing in the circle.

whats the exact hexcasting version. (also TIL minds reflection checks ambit... shouldn't self always be in ambit though???)

huh... at some point it stopped checking i player in range

    @Override
    public boolean isVecInRangeEnvironment(Vec3 vec) {
        var caster = this.execState.getCaster(this.world);
        if (caster != null) {
            var sentinel = HexAPI.instance().getSentinel(caster);
            if (sentinel != null
                && sentinel.extendsRange()
                && caster.level().dimension() == sentinel.dimension()
                && vec.distanceToSqr(sentinel.position()) <= SENTINEL_RADIUS * SENTINEL_RADIUS
            ) {
                return true;
            }
        }

        return this.execState.bounds.contains(vec);
    }

it has ambit on sentinal but not player.

Added exact version (although it seems like you may have already found the issue)

I tried to look through the entire history of circle-based casting environment
and it appears that it has NEVER had ambit on player

I tested this a little while ago in the same build and I found that it worked in the Fabric release for whatever reason, but now that I'm trying it again, it works in neither version(Fabric nor Forge). So bizarre, but it seems you found the root of the issue

Maybe I had accidentally been in range of a sentinel, oops

somewhere in the transition from CastingContext to CastingEnvironment the circles lost ambit on the bound player.
gonna make a quick PR for this

(also this brought up another question. why does OpGetCaster check ambit??)

oh wait this is duplicate of #561

why does OpGetCaster check ambit

wisps don't have ambit around the player that made them (only around themselves), so they shouldn't be able to get a reference to the summoner unless they're nearby
oddly, it seems like wisps can actually use Mind's Reflection even if the caster is nowhere nearby. i wonder how that works?